Tube-closure.



N0. 73O,3 78. PATENTED JUNE 9, 1903. I

" ALL LAMBERT.

TUBE" CLOSURE. APPLICATION FILED AUG. 28, 1902.

H0 MODEL.

awwwxtor 13 1 tn eases me perms PETERS co wumau'rum. WASHINGTON. n. c,

. iatented Jim; 9, 1903;

PATENT OFFICE.

ALBERT LESLIE LAMBERT, 'OFBRIDGETON, NEW JERSEY.

TUBE-CLOSURE.

SPECIFICATI N formingpart of Letters Patent No. 730,378, dated June 9,1903.

Application filed August 28. 1902. Serial No. 121,894. (No model.)

To ztZZ whom it may concern:

Be it known that I, ALBERT LESLIE LAM- BERT, a citizen of the UnitedStates, residing at Bridgeton, in the county of Cumberland and State ofNew Jersey, have invented certain new and useful Improvements inTube-Closures; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which-it appertains to make the same.

The invention relates to tube-closures designed for closing the ends ofpaper or wooden tubes and preventing the contents thereof becoming lostduring transportation.

The object of the invention is to provide a device of this characterwhich shall be simple in construction, durable in use, comparaposition.

tively inexpensive in production, and easily applied to and removed fromthe tube, but' which when in place in the tube cannot becomeaccidentally removed.

lVith these objects in view the invention consists in certain featuresof construction and combination of parts, which will be hereinafterfully set forth.

. 1n the accompanying drawings, Figure 1 is a perspective view of afragment of the mailing-tube, illustrating the application of theinvention. Fig. 2 is a longitudinal vertical sectional view through thesame, and Fig. 3 is a detail perspective view of the device removed fromthe tube.

In the drawings, 1 denotes a paper tube, and 2 the closure therefor.Thecfisureconsists of a body portion 3, preferably circular and made ofsheet metal of desired thickness and strength and provided with astrengthening-rib 3 and with stops 4 to limit the insertion of thedevice in the tube and with barbs or other retaining devices to preventthe accidental disengagement of the closure from the tube after it hasbeen inserted in The outline of the body portion preferably correspondsin shape tothe crosssectional area of the tube, and the retainingdevices or barbs are preferably made integral with and projecting in adiagonal direction from the edge of the body portion and have sufficientspring to yield toward the center tially as set forth.

of the body portion in the insertion of the closure within the tube andafter the closure has been inserted in position to spring outwardly andengage the material of which the tube is made, so that any tendency ofthe closure to withdraw or become accidentally disengaged with the tubewill cause the barbs to bury themselves into the material of the tube,and thus securely lock the closure in position. Y

To remove the closure, it is only necessary to insert the knife-bladebetween the retaining-barb and the side of the tube, when the closuremay be readily removed.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, operation, and embodiments ofthe invention will be readily understood without requiring any extendedinformation.

While the construction herein described and illustrated in theaccompanying drawings is the preferred form of the device, it is obviousthat various changes in the form, proportions, size, and minor detailsof the structure may be made without departing from the spirit orsacrificing any of the advantages of the invention.

Having thus described my invention, what I claim is l. Aclo'sure forthepurpose described, comprising a body portion and retaining-barbsprojecting radially and inclined outwardly from the edge thereof in adirection oblique to the plane of the body portion, substan- 2. Aclosure for the purpose described, comprising a body portion andretaining springbarbs projecting from the edge thereof, and stops forlimiting the insertion of the body portion within a tube, substantiallyas described.

3. A closure for the purpose described, comprising a bodyportion andretaining-barbs projecting radially and inclined outwardly from the edgethereof, in a direction oblique to the plane of the body portion, andmeans for limiting the insertion of the body portion within a tube,substantially as set forth.

4. A closure for the purpose described, comprising a body portion andretaining-barbs ICO projecting radially and inclined outwardly Intestimony whereof I have hereunto set from the edge thereof in adirection oblique my hand in presence of two subscribing Witto the planeof the body portion, and means nesses.

for limiting the insertion of the body portion ALBERT LESLIE LAMBERT. 5Within a tube, said means comprising out- \Vitnesses: r

wardly-projeeting stops adapted to engage EJBONC. LAMBERT,

the edge of the tube, substantially at set forth. MYRON NICHOLSON.

